>>11550210The conclusion of the excellent documentary film "A Certain Kind of Death" depicts such a mass cremation burial of the unmourned, in southern California. Thousands upon thousands of them. Every year. Belongings filed, shunted off to auction houses and other estate sales, attempts made to notify family or any contacts. Nothing, or as near to nothing as makes no difference. The cremains are put in a little can, collections of cans are pub in boxes like those, a plot is dug, and buried. Your photo there shows a process extremely similar to that depicted in the film.
The most metal part of the film is when they have the cremation machine going at full blast with the door open, and you can see the clear outline of a human skull and other bones being bashed into bits.
